Enter your desired payment and let us calculate your loan amount or, enter in the loan amount and we will calculate your monthly payment. The payments are going to cover not only paying down the debt but paying the interest that's accruing over time as well.Our Travis Quick-Pay service allows you to make a loan payment or credit card payment using a debit card, or your checking or savings account. If we make extra payments throughout the loan it'll automatically zero out our amortization table maintaining accuracy. Calculating interest over a certain period of time. We talked about the difference between a crude interest and interim interest. This student loan calculator compares the SAVE plan to other income-driven repayment plans, such as new and old IBR, PAYE, and refinancing. Complete Credit Report. Use this free Texas mortgage calculator to estimate your monthly mortgage payments and annual amortization. Senior Loan Officer.